Julia Montauk is the daughter of the serial killer Robert Montauk and his missing (presumed killed) wife Linette. She first appears is MAG 9: A Fathers Love where she has given her statement about her father's actions and motivations for the murders he committed when she was a girl.
Appearance and Details
As an adult, Julia is described as being "tall and lean, with close-cropped hair and a scar over her right eye." (MAG 36). She dresses nondescript, in hard-wearing denim and old leather (MAG 107). She carries a large canvas bag for at least some of her work.
Because Julia has been stalked for decades by The Dark, she maintained a terror of darkness well into adulthood. She took a night job at the suggestion of one of her better counselors. However, she did not overcome her fear of The Dark until apparently aligning with The Hunt.
Julia had a relatively happy and normal childhood until her mother, Linette, went missing when Julia was around 7 years old. Linette was a member of The People's Church of The Divine Host, and Maxwell Rayner "silenced" her when she tried to leave the cult.
Robert Montauk subsequently became a serial killer on behalf of Maxwell Rayner in the hopes of saving Linette. He killed more than 40 people, keeping only their hearts, which he stored in jars of formaldehyde in a shed in his back garden. Per Manuela, many of those hearts may have belonged to other cultists, whom Robert was feeding to "Mr. Pitch" to try to banish him.
While Robert was killing the last cult member required to banish Mr. Pitch, the creature terrorized and chased 12-year-old Julia. In a panic, Julia dialed emergency services and then burst into the shed to find her father performing a ritual that concluded with him stabbing the heart in his hand. Robert then apologized to Julia and fled.
According to one of the guards in Wakefield Prison, Julia was not allowed to see her father as a minor, although there are no details on who looked after her until she came of age. Upon turning 18, she started visiting her father, who lied and assured her being imprisoned wasn't so bad. They pretended to have a normal father-daughter relationship, as if Robert were not incarcerated.
Julia mentions in MAG 9, when she was 19 or so, that she had to attend compulsory counseling until recently.
2010 to Present (Spoilers)
Julia met Trevor Herbert in July 2010, when he saved her from The Dark as it tried to claim her during her shift as a night security guard. A company called DKN, affiliated with The People's Church of the Divine Host, was conducting a ritual in the office building where Julia worked in Manchester. When Julia fell into a deep pool of black water in a conference room, Trevor reached in and pulled her by the jacket, helping her pull herself out. A moment later an office worker named Darvish attacked Trevor, and when Julia saw Darvish's tattoo of the hand with the closed eye on it, she grabbed Trevor's fallen pocket knife and stabbed Darvish. Julia and Trevor immediately paired up, stabbed the remaining (collapsed) cultists, and then left together. They have traveled together, hunting monsters, ever since. Although Trevor is a competent solo hunter and teases Julia (which she has no problem returning), he also seems to enjoy deferring to her judgement and preferences in many cases.
The duo was responsible for burning down Ivy Meadows Care Home in July 2011 (MAG 36: Taken Ill). When Trevor tackled mortician Nicole Baxter, Julia instructed him to leave her alone. She later disagreed with Trevor's opinion that they should tell Nicole what was happening, saying that, in this case, running away was a better defense than knowledge.
Julia reappears several years later (June 2017) in MAG 107: Third Degree with the Vampire Killer, Trevor Herbert. She and Trevor kidnap Jon during an encounter with "Officer Max Musterman." Julia drives with Jonathan in the passenger's seat, while Trevor hides in the boot of the car and incapacitates the monster when it pulls Julia over.
Julia later gives a second statement (with input from Trevor) in MAG 109: Nightfall, giving more details about how the pair first met in July 2010 and how they started working together. She ends by explaining how the two of them ended up traveling around and killing monsters until they illegally ended up in the USA. She also mentions that although traveling around killing things doesn't provide a paycheck, "the odd bit of robbery and trespass" doesn't phase them.
In MAG 111: Family Business, it is revealed that the pair somehow obtained a copy of the skin book which contained the spirit of Gerard Keay, whom they have apparently been using as a sort of manual/dictionary to help them kill monsters. At the end of this statement, she and Trevor release Jon to return to England. Due to the illegal nature of their arrival in the USA, it appears the pair are stuck there, though they, at least for the moment, seem unconcerned about the fact, given the impending "Unknowing" scheduled to take place in the U.K.
In MAG 153: Love Bombing, Julia and Trevor show up at the Archives looking to retrieve Gerard's page from Jon. Upon learning that he burned the page, they are angry and plan to kill Jon, but are interrupted by the arrival of Daisy Tonner.
Julia has had nightmares of her mother and the dark in general since childhood. Since giving her statement in MAG 109, she now shares a recurring dream with Trevor in which the two of them creep through a newer versioned of the dark building in Manchester, an alert hunger on their faces, and try to stalk and catch the darkness before it does the same to them.